Question

Hour hand of a clock rotates at an angle of ________ is $24$ hours.

• A. ${180}^o$
• B. ${360}^o$
• C. ${540}^o$
• D. ${720}^o$

Answer 1

Answer: (D)

${720}^o$

Hour hand of a clock rotates ${360}^{\circ }$ in $12$ hours (i.e., one complete rotation)

$\therefore$ Hour hand of a clock rotates $2\times {360}^{\circ }={720}^{\circ }$ in $24$ hours (i.e., two complete rotations)

Option D is correct.